<wfs:GetFeature
        service="WFS" version="2.0.0"
        xmlns:fes="http://www.opengis.net/fes/2.0"
        xmlns:st_gml32="http://www.stations_gml32.org/1.0"
        xmlns:wfs="http://www.opengis.net/wfs/2.0">
    <wfs:Query typeNames="st_gml32:Station_gml32">
        <fes:Filter>
            <fes:And>
                <fes:PropertyIsEqualTo>
                    <fes:ValueReference>st_gml32:Station_gml32/st_gml32:tag</fes:ValueReference>
                    <fes:Literal>europe</fes:Literal>
                </fes:PropertyIsEqualTo>
                <fes:PropertyIsEqualTo>
                    <fes:ValueReference>
                        st_gml32:Station_gml32/st_gml32:measurements/ms_gml32:Measurement_gml32/ms_gml32:tag
                    </fes:ValueReference>
                    <fes:Literal>desert_tag</fes:Literal>
                </fes:PropertyIsEqualTo>
            </fes:And>
        </fes:Filter>
    </wfs:Query>
</wfs:GetFeature>